Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4ESK callsign genealogy
Currently held by Bartholomew, Freddie
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by N4ESK's current licensee, walking backwards.
- LU, YIHAOCAgranted 2023-05-23cancelled 2023-06-10
Successor callsigns
Callsigns held now by people who previously held N4ESK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4ESK, oldest first.
- Bartholomew, Freddie TN2009-01-23 → cancelled 2021-02-27
- LU, YIHAO CA2023-06-10 active